Nearly 400 children between the ages of 12 and 17 were diagnosed with heart inflammation after receiving the Pfizer-BioNTech COVID-19 vaccine, according to a study published by the Centers for Disease Control and Prevention (CDC) on July 30.
The condition, also known as myocarditis, occurred mostly in young boys, the study found. Heart inflammation wasn’t identified as an adverse reaction during the safety trials for the vaccine.
